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Lymphatic / Immune System (Anatomy of Lymphatic System (spleen- recycle…
Lymphatic / Immune System
Anatomy of Lymphatic System
spleen- recycle the breakdown product of red blood cells for later reuse, store blood platelets and monocytes, and removes blood borne pathogens and aged red blood cells
thymus- T. lymphocyte precursors mature to become immunocompetent lymphocytes in the thymus
node- cleanse lymph and house lymphocytes
MALT- guards the body's entryways against pathogens and is located in mucous membranes
Vessels- return excess tissue fluid to the blood , return leaked protein to the blood, carry pathogens to lymph nodes, and carry absorbed fat from the intestine to blood
antibodies
make up gamma globulin portion of blood
capable of binding specifically with antigens detected B cells
are protein secreted by plasma cells
also known as Immunoglobilin
humoral response
produces antibodies against the antigens which are present outside the infected cells or free circulating in the blood
quick response
associated with B-lymphocytes, T-lymphocytes and macrophages.
Adaptive (acquired) immune defensesd- third line of defense
Humeral immunity (B cells)
Cellular Immunity (T cells)
Disorders of immune system
Severe combined immunodeficiency (SCID)
HIV
Diabetes
Arthritis
Major Functions
Immune system
protect the host from environmental agents such as microbes or chemical
lymphatic system
Removal of excess fluids, lymph, from body tissues
Absorption of fatty acids and subsequent transport of fat, chyle, to the circulatory system
Formation of white blood cells (WBCs), and initiation of immunity through the formation of antibodies, lending specific resistance to pathogens
innate (natural) immune defenses- first and second line of defense
Surface barriers
First component is the skin
Second component is the mucous lining and it traps any pathogens trying to pass it
internal defenses
phagocytes
Natural killer cells
inflammation
antimicrobial protein
fever
Cellular responses
works inside the infected cells, where it destroyed the pathogens or microorganisms by the process of lysis by the releasing cytokines
Slow response
associated with T-lymphocytes, helper T cells, natural killer cells and macrophages
antigens
substances that can mobilize adaptive defenses and provide an immune response
targets of all adaptive immune responses